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都榮久,李東久 慶北大學校 醫科大學 1982 慶北醫大誌 Vol.23 No.2
Surgically resected 135 cases of gastric carcinoma were morphologically reviewed for the research of the relationship between the gastric carcinoma and the ulcer formation, and the results were summerized as follows. The ulcerating form was the most prevalent and 59 cases (43.7%). It was suggested that the larger the tumor, the more frequent tendency of the ulcer formation. On a histological view of the ulcerating type gastric carainoma, moderately differentiated tubular adenocarainoma was 35.6% and the most prevalent. According to the ulcerating type gastric carcinoma as whole, differentiated carcinoma was 46.3% and undifferentiated carcinoma was 53.7%. It was more likely that the depth of the ulcer was more prominent when the tumor get larger. Conclusively, it was suggested that the ulcer formation in the gastric carcinoma was not a gross specific form but a secondary process influenced by the tumor size and duration, whatever the types of the caricoma initially are.
고면저항 에미터 결정질 실리콘 태양전지의 전면전극 접촉저항 분석
안준용(Ahn, Jun-Yong),정주화(Cheong, Ju-Hwa),도영구(Do, Young-Gu),김민서(Kim, Min-Seo),정지원(Jeong, Ji-Weon) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.05
To improve the blue responses of screen-printed single crystalline silicon solar cells, we investigated an emitter etch-back technique to obtain high emitter sheet resistances, where the defective dead layer on the emitter surface was etched and became thinner as the etch-back time increased, resulting in the monotonous increase of short circuit current and open circuit voltage. We found that an optimal etch-back time should be determined to achieve the maximal performance enhancement because of fill factor decrease due to a series resistance increment mainly affected by contact and lateral resistance in this case. To elucidate the reason for the fill factor decrease, we studied the resistance analysis by potential mapping to determine the contact and the lateral series resistance. As a result, we found that the fill factor decrease was attributed to the relatively fast increase of contact resistance due to the dead layer thinning down with the lowest contact resistivity when the emitter was contacted with screen-printed silver electrode.